Hohb amplib ibs



Sept. 8, 1925. I 5 376 L. A. TILBEN ET AL.

TELEPHONE AMPLIFIER Filed March 5, 1921 low l9 A. Y

Curtis 'lfuadson.

WITNESSES Nil/EH70 A TTORNEIS preferred form, obviously lllfld llt'flll lns mu changes may be made without departing from the spirit of the in "eniion or the Hope of the claims.

W'e claim:

1. A telephone relay comprising :1 we tainer of a conducting medium it mmpit-mi enveloping wall in which the eonta mr l3 situated, means connecting the mntniner and envelope Inaintainin; them in emu-J relationship, the resulting (fllltlll l ll hung;- aglapted to be e acuated to pron-in, the em duction of sonrnl from wiihin the (my :iin a transmitter and receiver eitn (Kl witlfin the container, means lay nhi h cut-h is 51:51 ported in predetermined relationship to the other, and conducting wires leading from the transmitter and receiver through said spacing means, thereby avoiding :1 1m g through the evacuated space per se. i

2. A telephone. rplu qmnpi'i M l1 mini r wit hin roven'ei' means i v mite mm nertetl n iih 54ml enncluetors externally of the enntmiiel'.

LOUIS A. TlLDl lN. CURTIS KNUDSON. 

